Home / Training / Manuals / Atlas of breast cancer early detection / Learning

Atlas of breast cancer early detection

Breast imaging – Breast ultrasound – Ultrasound lexicon


The American College of Radiologists (ACR) introduced the BI-RADS Lexicon (5th edition; 2013) to standardize breast-imaging terminology, reporting, and assessment. The classification system applies to mammography, ultrasound, and MRI of the breast. Lesions detected on breast ultrasound are described using descriptors of the ultrasound lexicon. Shape, echotexture, margins, orientation, posterior features, calcifications, and vascularity on colour Doppler are effective lexicon descriptors for the characterization of breast masses as possibly benign or malignant. They can be used to assign a BI-RADS category.

The ultrasound lexicon includes the description of the following features:


Click on the pictures to magnify and display the legends

Click on this icon to display a case study

IARC, 150 Cours Albert Thomas, 69372 Lyon CEDEX 08, France - Tel: +33 (0)4 72 73 84 85 - Fax: +33 (0)4 72 73 85 75
© IARC 2024 - All Rights Reserved.